Chair for girder-rails



(No Model.)

A. J. MOXHAM. CHAIR FOR GIRDER RAILS.

No. 436,987. Patented Sept; 23, 1890.

g 7 INVENTO WITNESSES ATTORNEY UNITED STATES PATENT OFFICE.

ARTHUR J MOXHAM, OF JOHNSTOWN, PENNSYLVANIA.

CHAIR F OR GlRDER-RAILS.

SPECIFICATION forming part of Letters Patent No. 436,987, dated September 23, I890.

Application filed February 20, 1890. Serial No- 341,205. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR J. MOXHAM, of Johnstown, in the countyof Oambria and State of Pennsylvania, have invented a new and useful Chair for Gird'er-Rails, which invention is fully set forth and illustrated in the following specification and accompanying drawmgs.

The object of this invention is to make a brace-chair out of one homogeneous piece of metal.

The invention will first be described in detail, and then particularly set forth in the claim.

In the accompanying drawings, Figure 1 shows the chair in end elevation, having a girder-rail, shown in cross-section, secured thereto. Fig. 2 is a side elevation of Fig. 1, loooking to the right. Fig. 3 isa view in plan of the chair, the rail being omitted Fig. 4 shows the chair in perspective. Fig. 5 is a view of the blank of metal out of which the chair is made.

In said figures the several partsare indicated by letters of reference, as follows: The letter A indicates the portion of the chair which forms the brace or support against one side of the rail; B, the portion of the chair which forms one part of the box and the lower foot in continuation of the part A, and C the rail-base and foot portion corresponding to the part B on the opposite side of the same.

The letter a indicates the portion of the blank or shape of metal out of which the brace part A of the chair is constructed; 5, that portion of the shape which forms the part B of the chair, and c that portion of the shape which forms the part 0 of the chair, being the rail-base and one foot of the chair, as before said. a

The dotted lines in Fig. 4 show a View of a blank of metal like the blank shown in Fig. 5, differing only from the latter in having one of the arms at a different angle. Special angles for the several flanges of the metal blank to be used are not essential.

The chair is constructed by first rolling a tri-flange blank and then by drop-forging, rolling, or otherwise bending its respective flanges into the shape shown in Fig. 4. It is evident, of course, that it is not essential that the exact details of the chair as shown in said figure should be followed. The rail B may be of any shape and the brace portion A of the chair be made to fit various shaped rails; or said brace portion may, if desired, be made to merely overlap the lower flange of the rail without coming up against its side or head. The portion 0 of the chair may be made narrower to conform to the width of the lower flange of the rail, if desired, and the rail may be attached to the chair by means of a hook-head, bolt, or other devices well known in the art. In Fig. 1 the rail is shown secured to the chair by means of a clip S and key T, inserted in the hole U in the top of the chair.

Having thus fully described my said improvement as of my invention, I claim- A box-chair having a rail-base and side-rail clamp and base-flanges for securing the same in place, rolled, pressed, orotherwise bent into shape from a tri-flange blank of metal, as hereinbefore set forth.

ARTHUR J. MOXHAM.

WVitnesses:

C. R. POWELL, W. D. HALL. 

